How to prevent message about a printer filter when sending a print job as PDF file ?

[John Zoetebier]

If I send a postscript file as  PDF attachement with KMail I get a warning
message that no filter is available on the KDE system.
When I choos to convert I get this message:
==>
No appropriate filter was found to convert file format
application/postscript into.
Do you want to print the file using its original format ?
==>

After clicking on yes, the PDF attachement is send properly anyway.
How can I prevent this message about a printer filter when sending a print
job as PDF file ?

-- 
John Zoetebier
web site: http://www.transparent.co.nz

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